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Diffstat (limited to 'target/linux/mediatek/patches-4.9/0015-cpufreq-mediatek-add-driver.patch')
-rw-r--r--target/linux/mediatek/patches-4.9/0015-cpufreq-mediatek-add-driver.patch433
1 files changed, 0 insertions, 433 deletions
diff --git a/target/linux/mediatek/patches-4.9/0015-cpufreq-mediatek-add-driver.patch b/target/linux/mediatek/patches-4.9/0015-cpufreq-mediatek-add-driver.patch
deleted file mode 100644
index af60025..0000000
--- a/target/linux/mediatek/patches-4.9/0015-cpufreq-mediatek-add-driver.patch
+++ /dev/null
@@ -1,433 +0,0 @@
-From 8aa2c6c4d8b20c0e9c69b15db4a0039d33f8b365 Mon Sep 17 00:00:00 2001
-From: John Crispin <blogic@openwrt.org>
-Date: Wed, 30 Mar 2016 23:48:53 +0200
-Subject: [PATCH 15/57] cpufreq: mediatek: add driver
-
-Signed-off-by: John Crispin <john@phrozen.org>
----
- drivers/cpufreq/Kconfig.arm | 9 +
- drivers/cpufreq/Makefile | 1 +
- drivers/cpufreq/mt7623-cpufreq.c | 389 +++++++++++++++++++++++++++++++++++++++
- 3 files changed, 399 insertions(+)
- create mode 100644 drivers/cpufreq/mt7623-cpufreq.c
-
---- a/drivers/cpufreq/Kconfig.arm
-+++ b/drivers/cpufreq/Kconfig.arm
-@@ -74,6 +74,15 @@ config ARM_KIRKWOOD_CPUFREQ
- This adds the CPUFreq driver for Marvell Kirkwood
- SoCs.
-
-+config ARM_MT7623_CPUFREQ
-+ bool "Mediatek MT7623 CPUFreq support"
-+ depends on ARCH_MEDIATEK && REGULATOR
-+ depends on ARM || (ARM_CPU_TOPOLOGY && COMPILE_TEST)
-+ depends on !CPU_THERMAL || THERMAL=y
-+ select PM_OPP
-+ help
-+ This adds the CPUFreq driver support for Mediatek MT7623 SoC.
-+
- config ARM_MT8173_CPUFREQ
- tristate "Mediatek MT8173 CPUFreq support"
- depends on ARCH_MEDIATEK && REGULATOR
---- a/drivers/cpufreq/Makefile
-+++ b/drivers/cpufreq/Makefile
-@@ -58,6 +58,7 @@ obj-$(CONFIG_ARM_HIGHBANK_CPUFREQ) += hi
- obj-$(CONFIG_ARM_IMX6Q_CPUFREQ) += imx6q-cpufreq.o
- obj-$(CONFIG_ARM_INTEGRATOR) += integrator-cpufreq.o
- obj-$(CONFIG_ARM_KIRKWOOD_CPUFREQ) += kirkwood-cpufreq.o
-+obj-$(CONFIG_ARM_MT7623_CPUFREQ) += mt7623-cpufreq.o
- obj-$(CONFIG_ARM_MT8173_CPUFREQ) += mt8173-cpufreq.o
- obj-$(CONFIG_ARM_OMAP2PLUS_CPUFREQ) += omap-cpufreq.o
- obj-$(CONFIG_ARM_PXA2xx_CPUFREQ) += pxa2xx-cpufreq.o
---- /dev/null
-+++ b/drivers/cpufreq/mt7623-cpufreq.c
-@@ -0,0 +1,389 @@
-+/*
-+ * Copyright (c) 2015 Linaro Ltd.
-+ * Author: Pi-Cheng Chen <pi-cheng.chen@linaro.org>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ */
-+
-+#include <linux/clk.h>
-+#include <linux/cpu.h>
-+#include <linux/cpu_cooling.h>
-+#include <linux/cpufreq.h>
-+#include <linux/cpumask.h>
-+#include <linux/of.h>
-+#include <linux/platform_device.h>
-+#include <linux/pm_opp.h>
-+#include <linux/regulator/consumer.h>
-+#include <linux/slab.h>
-+#include <linux/thermal.h>
-+
-+#define VOLT_TOL (10000)
-+
-+/*
-+ * When scaling the clock frequency of a CPU clock domain, the clock source
-+ * needs to be switched to another stable PLL clock temporarily until
-+ * the original PLL becomes stable at target frequency.
-+ */
-+struct mtk_cpu_dvfs_info {
-+ struct device *cpu_dev;
-+ struct regulator *proc_reg;
-+ struct clk *cpu_clk;
-+ struct clk *inter_clk;
-+ struct thermal_cooling_device *cdev;
-+ int intermediate_voltage;
-+};
-+
-+static int mtk_cpufreq_set_voltage(struct mtk_cpu_dvfs_info *info, int vproc)
-+{
-+ return regulator_set_voltage(info->proc_reg, vproc,
-+ vproc + VOLT_TOL);
-+}
-+
-+static int mtk_cpufreq_set_target(struct cpufreq_policy *policy,
-+ unsigned int index)
-+{
-+ struct cpufreq_frequency_table *freq_table = policy->freq_table;
-+ struct clk *cpu_clk = policy->clk;
-+ struct clk *armpll = clk_get_parent(cpu_clk);
-+ struct mtk_cpu_dvfs_info *info = policy->driver_data;
-+ struct device *cpu_dev = info->cpu_dev;
-+ struct dev_pm_opp *opp;
-+ long freq_hz, old_freq_hz;
-+ int vproc, old_vproc, inter_vproc, target_vproc, ret;
-+
-+ inter_vproc = info->intermediate_voltage;
-+
-+ old_freq_hz = clk_get_rate(cpu_clk);
-+ old_vproc = regulator_get_voltage(info->proc_reg);
-+
-+ freq_hz = freq_table[index].frequency * 1000;
-+
-+ rcu_read_lock();
-+ opp = dev_pm_opp_find_freq_ceil(cpu_dev, &freq_hz);
-+ if (IS_ERR(opp)) {
-+ rcu_read_unlock();
-+ pr_err("cpu%d: failed to find OPP for %ld\n",
-+ policy->cpu, freq_hz);
-+ return PTR_ERR(opp);
-+ }
-+ vproc = dev_pm_opp_get_voltage(opp);
-+ rcu_read_unlock();
-+
-+ /*
-+ * If the new voltage or the intermediate voltage is higher than the
-+ * current voltage, scale up voltage first.
-+ */
-+ target_vproc = (inter_vproc > vproc) ? inter_vproc : vproc;
-+ if (old_vproc < target_vproc) {
-+ ret = mtk_cpufreq_set_voltage(info, target_vproc);
-+ if (ret) {
-+ pr_err("cpu%d: failed to scale up voltage!\n",
-+ policy->cpu);
-+ mtk_cpufreq_set_voltage(info, old_vproc);
-+ return ret;
-+ }
-+ }
-+
-+ /* Reparent the CPU clock to intermediate clock. */
-+ ret = clk_set_parent(cpu_clk, info->inter_clk);
-+ if (ret) {
-+ pr_err("cpu%d: failed to re-parent cpu clock!\n",
-+ policy->cpu);
-+ mtk_cpufreq_set_voltage(info, old_vproc);
-+ WARN_ON(1);
-+ return ret;
-+ }
-+
-+ /* Set the original PLL to target rate. */
-+ ret = clk_set_rate(armpll, freq_hz);
-+ if (ret) {
-+ pr_err("cpu%d: failed to scale cpu clock rate!\n",
-+ policy->cpu);
-+ clk_set_parent(cpu_clk, armpll);
-+ mtk_cpufreq_set_voltage(info, old_vproc);
-+ return ret;
-+ }
-+
-+ /* Set parent of CPU clock back to the original PLL. */
-+ ret = clk_set_parent(cpu_clk, armpll);
-+ if (ret) {
-+ pr_err("cpu%d: failed to re-parent cpu clock!\n",
-+ policy->cpu);
-+ mtk_cpufreq_set_voltage(info, inter_vproc);
-+ WARN_ON(1);
-+ return ret;
-+ }
-+
-+ /*
-+ * If the new voltage is lower than the intermediate voltage or the
-+ * original voltage, scale down to the new voltage.
-+ */
-+ if (vproc < inter_vproc || vproc < old_vproc) {
-+ ret = mtk_cpufreq_set_voltage(info, vproc);
-+ if (ret) {
-+ pr_err("cpu%d: failed to scale down voltage!\n",
-+ policy->cpu);
-+ clk_set_parent(cpu_clk, info->inter_clk);
-+ clk_set_rate(armpll, old_freq_hz);
-+ clk_set_parent(cpu_clk, armpll);
-+ return ret;
-+ }
-+ }
-+
-+ return 0;
-+}
-+
-+static void mtk_cpufreq_ready(struct cpufreq_policy *policy)
-+{
-+ struct mtk_cpu_dvfs_info *info = policy->driver_data;
-+ struct device_node *np = of_node_get(info->cpu_dev->of_node);
-+
-+ if (WARN_ON(!np))
-+ return;
-+
-+ if (of_find_property(np, "#cooling-cells", NULL)) {
-+ info->cdev = of_cpufreq_cooling_register(np,
-+ policy->related_cpus);
-+
-+ if (IS_ERR(info->cdev)) {
-+ dev_err(info->cpu_dev,
-+ "running cpufreq without cooling device: %ld\n",
-+ PTR_ERR(info->cdev));
-+
-+ info->cdev = NULL;
-+ }
-+ }
-+
-+ of_node_put(np);
-+}
-+
-+static int mtk_cpu_dvfs_info_init(struct mtk_cpu_dvfs_info *info, int cpu)
-+{
-+ struct device *cpu_dev;
-+ struct regulator *proc_reg = ERR_PTR(-ENODEV);
-+ struct clk *cpu_clk = ERR_PTR(-ENODEV);
-+ struct clk *inter_clk = ERR_PTR(-ENODEV);
-+ struct dev_pm_opp *opp;
-+ unsigned long rate;
-+ int ret;
-+
-+ cpu_dev = get_cpu_device(cpu);
-+ if (!cpu_dev) {
-+ pr_err("failed to get cpu%d device\n", cpu);
-+ return -ENODEV;
-+ }
-+
-+ cpu_clk = clk_get(cpu_dev, "cpu");
-+ if (IS_ERR(cpu_clk)) {
-+ if (PTR_ERR(cpu_clk) == -EPROBE_DEFER)
-+ pr_warn("cpu clk for cpu%d not ready, retry.\n", cpu);
-+ else
-+ pr_err("failed to get cpu clk for cpu%d\n", cpu);
-+
-+ ret = PTR_ERR(cpu_clk);
-+ return ret;
-+ }
-+
-+ inter_clk = clk_get(cpu_dev, "intermediate");
-+ if (IS_ERR(inter_clk)) {
-+ if (PTR_ERR(inter_clk) == -EPROBE_DEFER)
-+ pr_warn("intermediate clk for cpu%d not ready, retry.\n",
-+ cpu);
-+ else
-+ pr_err("failed to get intermediate clk for cpu%d\n",
-+ cpu);
-+
-+ ret = PTR_ERR(inter_clk);
-+ goto out_free_resources;
-+ }
-+
-+ proc_reg = regulator_get_exclusive(cpu_dev, "proc");
-+ if (IS_ERR(proc_reg)) {
-+ if (PTR_ERR(proc_reg) == -EPROBE_DEFER)
-+ pr_warn("proc regulator for cpu%d not ready, retry.\n",
-+ cpu);
-+ else
-+ pr_err("failed to get proc regulator for cpu%d\n",
-+ cpu);
-+
-+ ret = PTR_ERR(proc_reg);
-+ goto out_free_resources;
-+ }
-+
-+ ret = dev_pm_opp_of_add_table(cpu_dev);
-+ if (ret) {
-+ pr_warn("no OPP table for cpu%d\n", cpu);
-+ goto out_free_resources;
-+ }
-+
-+ /* Search a safe voltage for intermediate frequency. */
-+ rate = clk_get_rate(inter_clk);
-+ rcu_read_lock();
-+ opp = dev_pm_opp_find_freq_ceil(cpu_dev, &rate);
-+ if (IS_ERR(opp)) {
-+ rcu_read_unlock();
-+ pr_err("failed to get intermediate opp for cpu%d\n", cpu);
-+ ret = PTR_ERR(opp);
-+ goto out_free_opp_table;
-+ }
-+ info->intermediate_voltage = dev_pm_opp_get_voltage(opp);
-+ rcu_read_unlock();
-+
-+ info->cpu_dev = cpu_dev;
-+ info->proc_reg = proc_reg;
-+ info->cpu_clk = cpu_clk;
-+ info->inter_clk = inter_clk;
-+
-+ return 0;
-+
-+out_free_opp_table:
-+ dev_pm_opp_of_remove_table(cpu_dev);
-+
-+out_free_resources:
-+ if (!IS_ERR(proc_reg))
-+ regulator_put(proc_reg);
-+ if (!IS_ERR(cpu_clk))
-+ clk_put(cpu_clk);
-+ if (!IS_ERR(inter_clk))
-+ clk_put(inter_clk);
-+
-+ return ret;
-+}
-+
-+static void mtk_cpu_dvfs_info_release(struct mtk_cpu_dvfs_info *info)
-+{
-+ if (!IS_ERR(info->proc_reg))
-+ regulator_put(info->proc_reg);
-+ if (!IS_ERR(info->cpu_clk))
-+ clk_put(info->cpu_clk);
-+ if (!IS_ERR(info->inter_clk))
-+ clk_put(info->inter_clk);
-+
-+ dev_pm_opp_of_remove_table(info->cpu_dev);
-+}
-+
-+static int mtk_cpufreq_init(struct cpufreq_policy *policy)
-+{
-+ struct mtk_cpu_dvfs_info *info;
-+ struct cpufreq_frequency_table *freq_table;
-+ int ret;
-+
-+ info = kzalloc(sizeof(*info), GFP_KERNEL);
-+ if (!info)
-+ return -ENOMEM;
-+
-+ ret = mtk_cpu_dvfs_info_init(info, policy->cpu);
-+ if (ret) {
-+ pr_err("%s failed to initialize dvfs info for cpu%d\n",
-+ __func__, policy->cpu);
-+ goto out_free_dvfs_info;
-+ }
-+
-+ ret = dev_pm_opp_init_cpufreq_table(info->cpu_dev, &freq_table);
-+ if (ret) {
-+ pr_err("failed to init cpufreq table for cpu%d: %d\n",
-+ policy->cpu, ret);
-+ goto out_release_dvfs_info;
-+ }
-+
-+ ret = cpufreq_table_validate_and_show(policy, freq_table);
-+ if (ret) {
-+ pr_err("%s: invalid frequency table: %d\n", __func__, ret);
-+ goto out_free_cpufreq_table;
-+ }
-+
-+ /* CPUs in the same cluster share a clock and power domain. */
-+ cpumask_setall(policy->cpus);
-+ policy->driver_data = info;
-+ policy->clk = info->cpu_clk;
-+
-+ return 0;
-+
-+out_free_cpufreq_table:
-+ dev_pm_opp_free_cpufreq_table(info->cpu_dev, &freq_table);
-+
-+out_release_dvfs_info:
-+ mtk_cpu_dvfs_info_release(info);
-+
-+out_free_dvfs_info:
-+ kfree(info);
-+
-+ return ret;
-+}
-+
-+static int mtk_cpufreq_exit(struct cpufreq_policy *policy)
-+{
-+ struct mtk_cpu_dvfs_info *info = policy->driver_data;
-+
-+ cpufreq_cooling_unregister(info->cdev);
-+ dev_pm_opp_free_cpufreq_table(info->cpu_dev, &policy->freq_table);
-+ mtk_cpu_dvfs_info_release(info);
-+ kfree(info);
-+
-+ return 0;
-+}
-+
-+static struct cpufreq_driver mt7623_cpufreq_driver = {
-+ .flags = CPUFREQ_STICKY | CPUFREQ_NEED_INITIAL_FREQ_CHECK,
-+ .verify = cpufreq_generic_frequency_table_verify,
-+ .target_index = mtk_cpufreq_set_target,
-+ .get = cpufreq_generic_get,
-+ .init = mtk_cpufreq_init,
-+ .exit = mtk_cpufreq_exit,
-+ .ready = mtk_cpufreq_ready,
-+ .name = "mtk-cpufreq",
-+ .attr = cpufreq_generic_attr,
-+};
-+
-+static int mt7623_cpufreq_probe(struct platform_device *pdev)
-+{
-+ int ret;
-+
-+ ret = cpufreq_register_driver(&mt7623_cpufreq_driver);
-+ if (ret)
-+ pr_err("failed to register mtk cpufreq driver\n");
-+
-+ return ret;
-+}
-+
-+static struct platform_driver mt7623_cpufreq_platdrv = {
-+ .driver = {
-+ .name = "mt7623-cpufreq",
-+ },
-+ .probe = mt7623_cpufreq_probe,
-+};
-+
-+static int mt7623_cpufreq_driver_init(void)
-+{
-+ struct platform_device *pdev;
-+ int err;
-+
-+ if (!of_machine_is_compatible("mediatek,mt7623"))
-+ return -ENODEV;
-+
-+ err = platform_driver_register(&mt7623_cpufreq_platdrv);
-+ if (err)
-+ return err;
-+
-+ /*
-+ * Since there's no place to hold device registration code and no
-+ * device tree based way to match cpufreq driver yet, both the driver
-+ * and the device registration codes are put here to handle defer
-+ * probing.
-+ */
-+ pdev = platform_device_register_simple("mt7623-cpufreq", -1, NULL, 0);
-+ if (IS_ERR(pdev)) {
-+ pr_err("failed to register mtk-cpufreq platform device\n");
-+ return PTR_ERR(pdev);
-+ }
-+
-+ return 0;
-+}
-+device_initcall(mt7623_cpufreq_driver_init);